1) branches/ has the old c++ port and the attempt at a java port
2) I think trunk/ may have the new c++ port

However... another note. There is a soon to be released project that is about ready for the first release, that will obsolete box2d4d. So, there is probably not much benefit for anybody to work on this. But if you want to, the initial start is there.

There is a soon to be released project that is about ready for the first release, that will obsolete box2d4d. So, there is probably not much benefit for anybody to work on this. But if you want to, the initial start is there.